Selection Recommendations for Check Valves: A Comprehensive Guide for Industrial Applications

Butterfly Type Check Valve is a compact, lightweight option featuring two curved plates that open like butterfly wings, also called dual plate check valve. This wafer check valve is characterized by its thin, space-saving design, making it perfect for constrained piping layouts. It has low pressure drop and anti-clogging performance, suitable for systems with suspended particles, such as chemical processing and power generation. When selecting, prioritize models with corrosion-resistant materials for harsh media and ensure fast-closing performance to prevent water hammer. It is not recommended for high-pressure or high-temperature applications due to relatively poor sealing.

Swing Check Valve, one of the most widely used types, has a hinged disc that swings open with forward flow and closes by gravity and reverse pressure. It suits large-flow, low-pressure systems like water plants and refineries. For selection, consider the installation orientation—horizontal installation is preferred, while vertical installation requires upward flow. Add a lever or dashpot accessory to avoid valve slam in pump discharge lines.

Ball Type Check Valve uses a hollow floating ball as the valve disc inside, which has good sealing and low flow resistance, and does not have strict requirements for installation position. Commonly used for household water supply and small flow systems.